28811081047 has 16 divisors (see below), whose sum is σ = 33323418432. Its totient is φ = 24399244800.

The previous prime is 28811081027. The next prime is 28811081083. The reversal of 28811081047 is 74018011882.

It is a de Polignac number, because none of the positive numbers 2^k-28811081047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28811081027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193297 + ... + 308197.

It is an arithmetic number, because the mean of its divisors is an integer number (2082713652).

Almost surely, 2^28811081047 is an apocalyptic number.

28811081047 is a deficient number, since it is larger than the sum of its proper divisors (4512337385).

28811081047 is a wasteful number, since it uses less digits than its factorization.

28811081047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115338.

The product of its (nonzero) digits is 28672, while the sum is 40.

The spelling of 28811081047 in words is "twenty-eight billion, eight hundred eleven million, eighty-one thousand, forty-seven".